Stock material or miscellaneous articles – Structurally defined web or sheet – Discontinuous or differential coating – impregnation or bond
Patent
1980-02-19
1981-10-20
Bell, James J.
Stock material or miscellaneous articles
Structurally defined web or sheet
Discontinuous or differential coating, impregnation or bond
428296, D04H 158
Patent
active
042961688
ABSTRACT:
The mixture of fibers forming a relatively dense, thick, non-woven matted padding sheet are bonded together by means of incorporating a minor proportion of loose, relatively low heat softening point, polypropylene fibers in the mixture and momentarily heating the matted sheet sufficiently to momentarily soften the polypropylene fibers so that they adhere to the other fibers at their points of intersection therewith. Thus, the overall mixture of fibers are bonded together by the randomly extending polypropylene fibers.
REFERENCES:
patent: 3620892 (1971-11-01), Wincklhofer et al.
patent: 3639195 (1972-02-01), Sanders
patent: 3801428 (1974-04-01), Striegler et al.
patent: 4128679 (1978-12-01), Pohland
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